Multiple Vulnerabilities in 7-Zip Could Allow for Arbitrary Code Execution

MS-ISAC ADVISORY NUMBER:

2018-009

DATE(S) ISSUED:

01/24/2018

OVERVIEW:

Multiple vulnerabilities have been discovered in 7-Zip, the most severe of which could allow for arbitrary code execution. 7-Zip is a free and open-source file archiver. Successful exploitation of the most severe of these vulnerabilities could allow for arbitrary code execution. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

THREAT INTELLIGENCE:

There are currently no reports of these vulnerabilities being exploited in the wild.

SYSTEMS AFFECTED:

7-Zip versions prior to 18.00

RISK:

Government:

Large and medium government entities: HIGH

Small government entities: HIGH

Businesses:

Large and medium business entities: HIGH

Small business entities: HIGH

Home Users:

HIGH

TECHNICAL SUMMARY:

Multiple vulnerabilities have been discovered in 7-Zip, the most severe of which could allow for arbitrary code execution. Details of these vulnerabilities are as follows:

Successful exploitation of the most severe of these vulnerabilities could allow for arbitrary code execution. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

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